We show that the recent experimental observation of the rectification of swimming bacteria in a system with an array of asymmetric barriers occurs due to the ballistic component of the bacteria trajectories introduced by the bacterial "motor." Each bacterium selects a random direction for motion and then moves in this direction for a fixed period of time before randomly changing its orientation...

An exact lattice Langevin equation is derived for the ballistic deposition model of surface growth. The continuum limit of this equation is dominated by the Kardar-Parisi-Zhang (KPZ) equation at all length and time scales. For a one-dimensional substrate the solution of the exact lattice Langevin equation yields the KPZ scaling exponents without any extrapolation. For a two-dimensional substrat...

The behavior of a heavy tagged intruder immersed in a bath of particles evolving under ballistic annihilation dynamics is investigated. The Fokker-Planck equation for this system is derived and the peculiarities of the corresponding diffusive behavior are worked out. In the long time limit, the intruder velocity distribution function approaches a Gaussian form, but with a different temperature ...

We study theoretically non-local spin-transport in a ballistic carbon nanotube contacted to two ferromagnetic leads and two normal metal leads. When the magnetizations of the two ferromagnets are changed from a parallel to an antiparallel configuration, the circuit shows an hysteretic behavior which is specific to the few-channels regime. In the coherent limit, the amplitude of the magnetic sig...

The behavior of a heavy tagged intruder immersed in a bath of particles evolving under ballistic annihilation dynamics is investigated. The Fokker-Planck equation for this system is derived and the peculiarities of the corresponding diffusive behavior are worked out. In the long time limit, the intruder velocity distribution function approaches a Gaussian form, but with a different temperature ...

We report a study in which Andreev reflection using a Nb point contact is used to measure the transport spin polarisation of the 4d itinerant ferromagnet SrRuO3. By performing the study in high quality thin films with residual resistivities less than 7μΩ-cm, we ensure that the study is done in the ballistic limit, a regime which is difficult to reach in oxide ferromagnets. The degree of transpo...

Most of the work on understanding spin relaxation in graphene for spintronic applications relies on the assumption that spin polarization is lost due to scattering and dephasing processes. Here, we present results of a recent theoretical study of spin dynamics of supported graphene in the ballistic regime [1]. This can be relevant in high-quality devices where electron scattering no longer domi...

We study the leakage of air in syringes with Teflon coated rubber stopper and glass barrel. The leakrate depends on interfacial surface roughness, viscoelastic properties elastoplastic coating. measured rates are compared to predictions a simple theory for gas flow, which takes into account both diffusive ballistic multiscale contact mechanics determines probability distribution separations. sh...

The scaling of device technologies poses new challenges, not only in circuit design, but also in device modeling, especially because of the short-channel effects and the emergence of novel phenomena like ballistic transport. Nonetheless, it enables the design of ultra low-power analog and Radio Frequency (RF) circuits by allowing to push the operating points into moderate and eventually weak in...

We examine the existence of nonlinear modes and their temporal dynamics, in arrays split-ring resonators, using a fractional extension Laplacian evolution equation. find closed-form expression for dispersion relation as function exponent well an exact critical coupling between rings, beyond which no magnetoinductive wave can exist. also low-lying families bulk surface bifurcation diagrams. Here...